What MSP Technologies does

MSP Technologies Ltd, trading as Multi Source Power, is a British designer and manufacturer of modular Battery Energy Storage Systems (BESS) sold under the Flex-ESS brand. Founded in 2013 by Simon Patterson — who transferred hybrid and electric marine drivetrain experience into onshore energy storage — the company produces factory-built-and-tested modular storage systems for commercial, industrial, utility-scale, higher-education, EV-charging, hospitality, agricultural, and remote-microgrid customers. Headquartered in Holme, Cumbria, MSP sells directly to project developers, universities, hotels, farms, breweries, waste management operators, and event organisers across the UK, Europe, the Middle East, Africa, and South America.

The Flex-ESS portfolio spans Flex-ESS1000 (up to 1 MW charge/discharge with up to 1,040 kWh storage per unit), Flex-ESS500 (500 kVA / up to 736 kWh), Flex-ESS250 (250 kVA / up to 732 kWh), Flex-ESS Micro-Series (25–150 kVA modular blocks), Flex-ESS ID (indoor 800V DC), Flex-EV (integrated storage plus up to 300 kW DC fast charging), and the latest Flex-ESS1500 built on Hithium's 43 kWh LFP modules. Core technology comprises MSP's proprietary FLEX Inverter (peak efficiency above 98.6%, bidirectional four-quadrant grid-forming/grid-following, water-cooled), integration with both KORE Power Mark 1 and Hithium LFP battery modules, a three-step fire protection process using Li-ion Tamer off-gas detection, and DC-coupled PV-plus-storage via Ampt String Optimizers. Modular paralleling permits scaling from 25 kVA residential-style configurations to multi-MW utility deployments in IP64 outdoor enclosures.

MSP operates a bespoke, project-based commercial model with quote-driven pricing, engineering-led quotations, in-house installation and commissioning, and a dedicated after-sales helpdesk. Revenue is generated primarily from one-time hardware sales of complete BESS units, supplemented by engineering, installation, and commissioning services, with no disclosed recurring software or service fees. Manufacturing runs across four production lines at a 2,000+ square metre facility in Cumbria, with stated capacity for at least three systems per week. The company is privately held by founder and Managing Director Simon Patterson, with no disclosed institutional investors beyond a single 2014 seed round from Ruffena Capital.

Name

MSP Technologies

Legal name

MSP Technologies Ltd

Website

https://multisourcepower.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

1–10 employees

Short description

MSP Technologies (trading as Multi Source Power) designs and manufactures modular Battery Energy Storage Systems under the Flex-ESS brand, serving commercial, industrial, utility, education, EV charging, and remote-microgrid customers across the UK, Europe, the Middle East, and Africa.

Ownership category

akta.pro rank

Product category

Battery Energy Storage Systems

NAICS

Electric Power Generation, Transmission and Distribution (2211), Electric Power Transmission, Control, and Distribution (22112)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

BESS OEMs (Containerized Systems, Racks, Turnkey Solutions) (EUAFAAAC)

akta.pro secondary industries

BESS EPC, Integration & Commissioning (EUAFAAAB), Stationary Energy Storage Systems (BESS/ESS Integrators) (IMAGAHAD), Energy Storage Software & Controls (EMS, monitoring, optimization, cybersecurity) (IMAGAHAJ), Utility-Scale BESS EPC & Integration (EUAEAEAA)

Keywords

• Battery energy storage systems
• Modular BESS solutions
• Grid-forming storage
• Commercial industrial energy storage
• EV charging battery systems

Headquarters

HQ city

Holme

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Battery Energy Storage System (BESS) Hardware Sales: Sale of factory-built, modular Flex-ESS energy storage systems including Flex-ESS1000, Flex-ESS500, Flex-ESS250, Flex-ESS Micro-Series, Flex-ESS ID, and Flex-EV. Systems are sold as complete turnkey solutions including battery modules, inverters, controllers, and thermal management. Revenue is project-based, one-time per installation, with scale driven by unit count and power/storage capacity.
2. Engineering, Installation & Commissioning Services: Pre-sales engineering support including site assessment, solution design, and custom configuration. Post-sale services cover installation, commissioning, and ongoing technical support. Helpdesk ticketing system provides after-sales assistance.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

MSP Technologies (trading as Multi Source Power) designs, manufactures, and sells modular Battery Energy Storage Systems (BESS) under the Flex-ESS brand for commercial, industrial, utility-scale, EV charging, and off-grid applications. Systems are factory-built-and-tested, integrate a proprietary FLEX Inverter, KORE Power or Hithium LFP battery modules, water-cooled thermal management, and grid-forming power electronics, and are delivered as complete turnkey solutions spanning 25kVA to multi-MW configurations. The company also provides pre-sales engineering, installation, commissioning, and after-sales technical support services.

Product overview

MSP Technologies (trading as Multi Source Power) is a British energy storage manufacturer offering a portfolio of modular battery energy storage systems (BESS) sold under the Flex-ESS brand. The product line spans utility-scale (Flex-ESS1000), commercial/industrial (Flex-ESS500, Flex-ESS250), small-scale/microgrid (Flex-ESS Micro-Series), indoor (Flex-ESS ID), and EV charging (Flex-EV) applications. The Flex-ESS1500 represents the latest addition, integrating Hithium's large-format LFP batteries. All systems share a common architecture built around MSP's proprietary FLEX Inverter, KORE Power or Hithium battery modules, and a 3-step fire protection process including Li-ion Tamer off-gas detection. The modular, factory-built-and-tested design enables rapid deployment from delivery to commissioning in hours rather than days, supporting both grid-connected and off-grid applications including frequency balancing, renewable colocation, peak shaving, and UPS/back-up power.

Differentiator

Problem solved

Functional benefit

Brands

• Flex-ESS: Modular battery energy storage system product line including Flex-ESS1000, Flex-ESS500, Flex-ESS250, Flex-ESS ID, and Flex-ESS Micro-Series for utility-scale, commercial, industrial, and off-grid applications.
• Flex-EV

Products and services

• Flex-ESS1000 Utility-scale modular battery energy storage system (BESS) manufactured in Great Britain, offering 1Hr to 4Hrs+ output with up to 1MWp charge/discharge and 1,040kWh storage per unit using KORE Mark 1 batteries. Designed for multi-MW projects with grid-forming and grid-following capabilities for on- and off-grid applications, and ultra-low lifetime OPEX and installation costs.
• Flex-ESS500 Commercial and industrial energy storage system providing 500kVA power output and up to 736kWh storage per housing. Integrates Hithium Storage Modules and the proprietary FLEX Inverter in an IP64-rated outdoor enclosure, offering grid security, renewables enhancement, and UPS backup with the smallest footprint in the ESS market for rapid, low-cost installation.
• Flex-ESS250 Hybrid Compact, energy-dense hybrid power system with 250kVA output and up to 732kWh storage per housing. Designed for colocation with planned or existing solar and wind generation and EV charging equipment deployment, featuring Hithium LFP storage, water-cooled inverter (98.6% peak efficiency), and IP64-rated enclosure for rapid commercial and industrial installation.
• Flex-ESS Micro-Series Small-scale modular energy storage system with 25-150kVA power range and 261kWh storage per housing, expandable via additional 215kWh energy expansion housings. Features an ultra-low 2m x 2m x 1.5m footprint, IP64 GRP housing, and is designed for small-to-medium industrial, commercial, and microgrid applications with optional DC-coupled solar. Launched August 2022.
• Flex-EV ESS-based DC EV charging system providing up to 300kW charging with 416kWh integrated storage. Features variable fast charging configurations, modular design for progressive investment, and solar MPPT hybrid capability, eliminating the need for costly grid supply upgrades and supporting grid services and energy trading revenue alongside EV charging.
• Flex-ESS ID Indoor-rated energy storage system with 800V DC architecture, designed for commercial and industrial energy arbitrage and solar self-consumption. Features modular, easily installed design with plug-and-play factory-built-and-tested architecture for indoor commercial premises and fuel station installations. Launched September 2022.
• Flex-ESS1500 Large-format modular energy storage system powered by Hithium LFP batteries (43kWh modules), offering scalability and performance without cobalt. Designed for commercial and industrial applications with a sustainable, green supply chain following Hithium's first shipment to MSP. Launched April 2024.
• Engineering, Installation and Commissioning Services Pre-sales engineering support including site assessment, solution design, and custom configuration, plus post-sale installation, commissioning, and ongoing technical support delivered by MSP's own field service and engineering teams. Includes an after-sales helpdesk ticketing system for issue resolution.

Quantifiable outcome

• Flex-ESS1000 achieves 1.1MWh storage on 5.44m2 footprint — class-leading energy density
• +4 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature5 records

Partnerships

Seven partnerships are on record, tiered core, flagship and minor.

• AmptcoreTechnology or Integration · 29 April 2025Strategic technology partnership combining MSP's Flex-ESS battery energy storage systems with Ampt String Optimizers for DC-coupled PV-plus-storage solutions. Ampt String Optimizers perform maximum power point tracking (MPPT) on each PV string and deliver full available power while following battery voltage as it charges/discharges. This battery-centric approach maintains grid-forming and black start capabilities while reducing CAPEX and system footprint compared to AC-coupled alternatives. Collaboration is delivering solutions across UK, Europe, and international markets.
• HithiumcoreTechnology or Integration · 9 April 2024LFP (Lithium Iron Phosphate) battery cell supplier. Hithium is a company dedicated to innovation, sustainability, and ethical business practices, and is a member of the UN Global Compact (UNGC) with outstanding ESG performance. Hithium's large-format 43kWh modules power MSP's new Flex-ESS1500 systems. Water-cooling technology maintains consistent cell temperature. Hithium has a proven track record of 23 GWh of deployments globally.
• KORE PowercoreTechnology or IntegrationBattery cell and module supplier providing KORE Mark 1 batteries for Flex-ESS systems. MSP has received multiple 3.5 MWh shipments of KORE Power batteries. Mark 1 modules integrated into Flex-ESS energy storage solutions for EV charging infrastructure and university solar storage projects. Long-standing supplier relationship with regional VP Sales covering EMEA.
• AFC EnergyflagshipStrategic or Co-development PartnerStrategic partnership for hydrogen fuel cell deployments. MSP's Flex-ESS systems support AFC Energy's leading hydrogen fuel cell technology in remote and challenging environments. Deployment includes NEOM mega-project in Saudi Arabia. Partnership exemplifies MSP's role in the emerging Hydrogen Economy and global decarbonisation efforts.
• Made in BritainminorOthersMembership organisation supporting British Manufacturing Community. MSP was recently accepted into the organisation, which supports British manufacturers and allows the use of the Made in Britain (MiB) logo mark.
• Britain's Energy Coast Business Cluster (BECB)minorOthersBusiness cluster supporting the energy industry and growing the supply chain across Britain's Energy Coast. Brings together businesses from multinationals to sole traders and start-ups. MSP joined to gain knowledge, networking opportunities, and build relationships with other clean energy sector businesses.
• Hillside Environmental / Integral UKminorImplementation/ SI/ Consulting PartnerCollaborative partners for the Gloucestershire College #GCZero project, working alongside MSP to deliver the college's pioneering carbon zero initiative. Other renewables providers also involved in the multi-partner delivery.

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Emerging players

• Stem Inc: AI-driven energy storage and virtual power plant operator focused on C&I behind-the-meter and front-of-meter deployments; overlaps with MSP's grid services and C&I energy arbitrage proposition, particularly in North American and select EMEA markets.

Regional players

• Powervault: UK-based residential and small-commercial battery storage company serving similar UK C&I customers with behind-the-meter and solar self-consumption solutions — adjacent product categories to MSP's Flex-ESS Micro and ID lines.

Direct peers

• BYD Energy Storage: BYD's Battery-Box and C&I/utility-scale BESS products overlap with Flex-ESS Micro, 250, and 1000 series, especially in UK/EU C&I and large-scale deployments. BYD also supplies LFP cells, giving it vertical integration MSP lacks.
• Saft (TotalEnergies): Saft manufactures containerized BESS (intensium Max, Flex'ion) targeting utility and industrial customers in Europe, directly competing with MSP for grid-services and C&I projects in MSP's core EMEA markets.
• Invinity Energy Systems: UK-based battery energy storage manufacturer (vanadium flow technology) competing with MSP in the UK/EU utility-scale and microgrid segments, including grid services and remote community applications.
• Fluence: Fluence is a global BESS systems integrator (Siemens-AES JV) competing head-to-head with Flex-ESS in utility-scale grid services, renewable storage, and C&I applications, with comparable product families like Gridstack and Edgestack.
• Tesla Energy: Tesla's Megapack and Powerpack are utility-scale and commercial BESS products directly competing with MSP's Flex-ESS line in grid services, renewable colocation, and peak shaving applications worldwide.
• Sungrow: Sungrow offers a broad portfolio of utility-scale and C&I battery storage solutions (ST-series) with integrated PCS, comparable to MSP's Flex-ESS modular architecture. Both compete for grid-services and renewable colocation contracts in EMEA.

Broad incumbents

• Schneider Electric: Schneider offers distributed energy resource management, microgrid, and BESS integration services overlapping with MSP's grid-forming, EV charging, and C&I use cases, but as one capability within a much larger energy management portfolio.
• ABB: Global industrial electrification and power systems incumbent offering PCS, microgrid, and energy storage solutions across utility, C&I, and EV charging applications — overlapping with MSP but as part of a much broader portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/MSPTechLtd
• LinkedInlinkedin.com/company/multi-source-power-technologies

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about MSP Technologies